许多做电子商务的朋友肯定需要各大电子商务的最新资讯，有很多分享达人的文章一篇就可以引爆流量，这样的好文章不拿过来用简直可惜，那如何才能实时采集最新的达人文章，并一键发布到自己的网站，实现全自动发布更新，是每个站长的梦想，今天g哥就来分享下淘宝头条文章采集爬虫技术。
淘宝头条的采集难点比较多，一般的基于浏览器引擎的采集器，受限于js的跳转，不能稳定的采集，基于http/https模拟请求的采集器，又将面临一个更大的问题，淘宝头条的请求都是签名加密的，必须分析它的加密算法实现模拟正常请求，采集到数据，下面g哥就来解析下如何通过模拟请求抓取淘宝头条的文章数据。
准备工作
1、分析请求，并解密加密算法
2、制作爬虫
3、测试采集
分析请求
首先分析请求发现，头条请求的URL如下
https://api.m.taobao.com/h5/mtop.taobao.fivemin.column.getcolumnlist/3.0/?v=3.0&api=mtop.taobao.fivemin.column.getColumnList&appKey=12574478&t=1536298782500&callback=mtopjsonp4&type=jsonp&sign=55a67d402f95b0fa503f0f6dd5bdd89e&data=%7B%22columnId%22%3A%2246%22%2C%22publishId%22%3A%221009650741466957211%22%7D
里面存在几个关键参数，分别是data、sign，data是数据参数的JSON格式，sign是校验字段，其中sign是需要分析出他的加密算法的。
通过g哥的努力，分析到了它加密的主要代码，如下：
function a9(b, a) {
return b << a | b >>> 32 - a
}
function bf(g, d) {
var j, c, f, b, h;
return f = 2147483648 & g,
b = 2147483648 & d,
j = 1073741824 & g,
c = 1073741824 & d,
h = (1073741823 & g) + (1073741823 & d),
j & c ? 2147483648 ^ h ^ f ^ b : j | c ? 1073741824 & h ? 3221225472 ^ h ^ f ^ b : 1073741824 ^ h ^ f ^ b : h ^ f ^ b
}
function bk(b, a, c) {
return b & a | ~b & c
}
function bb(b, a, c) {
return b & c | a & ~c
}
function bs(b, a, c) {
return b ^ a ^ c
}
function be(b, a, c) {
return a ^ (b | ~c)
}
function ba(h, g, b, i, f, j, d) {
return h = bf(h, bf(bf(bk(g, b, i), f), d)),
bf(a9(h, j), g)
}
function bq(h, f, b, j, g, k, d) {
return h = bf(h, bf(bf(bb(f, b, j), g), d)),
bf(a9(h, k), f)
}
function a8(g, b, f, h, d, j, a) {
return g = bf(g, bf(bf(bs(b, f, h), d), a)),
bf(a9(g, j), b)
}
function bh(j, f, h, b, g, k, d) {
return j = bf(j, bf(bf(be(f, h, b), g), d)),
bf(a9(j, k), f)
}
function bp(h) {
for (var l, f = h.length, g = f + 8, b = (g - g % 64) / 64, k = 16 * (b + 1), d = new Array(k - 1), m = 0, j = 0; f > j; ) {
l = (j - j % 4) / 4,
m = j % 4 * 8,
d[l] = d[l] | h.charCodeAt(j) << m,
j++
}
return l = (j - j % 4) / 4,
m = j % 4 * 8,
d[l] = d[l] | 128 << m,
d[k - 2] = f << 3,
d[k - 1] = f >>> 29,
d
}
function bd(d) {
var b, f, a = "", c = "";
for (f = 0; 3 >= f; f++) {
b = d >>> 8 * f & 255,
c = "0" + b.toString(16),
a += c.substr(c.length - 2, 2)
}
return a
}
function bn(c) {
c = c.replace(/\r\n/g, "\n");
for (var b = "", d = 0; d < c.length; d++) {
var a = c.charCodeAt(d);
128 > a ? b += String.fromCharCode(a) : a > 127 && 2048 > a ? (b += String.fromCharCode(a >> 6 | 192),
b += String.fromCharCode(63 & a | 128)) : (b += String.fromCharCode(a >> 12 | 224),
b += String.fromCharCode(a >> 6 & 63 | 128),
b += String.fromCharCode(63 & a | 128))
}
return b
}
然后g哥写了个encode函数，用来加密自定义的请求串，代码如下：
function encode(bo){
var bl, bg, a7, bm, a6, br, a4, a3, G, J = [], bt = 7, aZ = 12, Q = 17, X = 22, bc = 5, a1 = 9, F = 14, a5 = 20, L = 4, U = 11, z = 16, bj = 23, bi = 6, a0 = 10, Y = 15, a2 = 21;
for (bo = bn(bo),
J = bp(bo),
br = 1732584193,
a4 = 4023233417,
a3 = 2562383102,
G = 271733878,
bl = 0; bl < J.length; bl += 16) {
bg = br,
a7 = a4,
bm = a3,
a6 = G,
br = ba(br, a4, a3, G, J[bl + 0], bt, 3614090360),
G = ba(G, br, a4, a3, J[bl + 1], aZ, 3905402710),
a3 = ba(a3, G, br, a4, J[bl + 2], Q, 606105819),
a4 = ba(a4, a3, G, br, J[bl + 3], X, 3250441966),
br = ba(br, a4, a3, G, J[bl + 4], bt, 4118548399),
G = ba(G, br, a4, a3, J[bl + 5], aZ, 1200080426),
a3 = ba(a3, G, br, a4, J[bl + 6], Q, 2821735955),
a4 = ba(a4, a3, G, br, J[bl + 7], X, 4249261313),
br = ba(br, a4, a3, G, J[bl + 8], bt, 1770035416),
G = ba(G, br, a4, a3, J[bl + 9], aZ, 2336552879),
a3 = ba(a3, G, br, a4, J[bl + 10], Q, 4294925233),
a4 = ba(a4, a3, G, br, J[bl + 11], X, 2304563134),
br = ba(br, a4, a3, G, J[bl + 12], bt, 1804603682),
G = ba(G, br, a4, a3, J[bl + 13], aZ, 4254626195),
a3 = ba(a3, G, br, a4, J[bl + 14], Q, 2792965006),
a4 = ba(a4, a3, G, br, J[bl + 15], X, 1236535329),
br = bq(br, a4, a3, G, J[bl + 1], bc, 4129170786),
G = bq(G, br, a4, a3, J[bl + 6], a1, 3225465664),
a3 = bq(a3, G, br, a4, J[bl + 11], F, 643717713),
a4 = bq(a4, a3, G, br, J[bl + 0], a5, 3921069994),
br = bq(br, a4, a3, G, J[bl + 5], bc, 3593408605),
G = bq(G, br, a4, a3, J[bl + 10], a1, 38016083),
a3 = bq(a3, G, br, a4, J[bl + 15], F, 3634488961),
a4 = bq(a4, a3, G, br, J[bl + 4], a5, 3889429448),
br = bq(br, a4, a3, G, J[bl + 9], bc, 568446438),
G = bq(G, br, a4, a3, J[bl + 14], a1, 3275163606),
a3 = bq(a3, G, br, a4, J[bl + 3], F, 4107603335),
a4 = bq(a4, a3, G, br, J[bl + 8], a5, 1163531501),
br = bq(br, a4, a3, G, J[bl + 13], bc, 2850285829),
G = bq(G, br, a4, a3, J[bl + 2], a1, 4243563512),
a3 = bq(a3, G, br, a4, J[bl + 7], F, 1735328473),
a4 = bq(a4, a3, G, br, J[bl + 12], a5, 2368359562),
br = a8(br, a4, a3, G, J[bl + 5], L, 4294588738),
G = a8(G, br, a4, a3, J[bl + 8], U, 2272392833),
a3 = a8(a3, G, br, a4, J[bl + 11], z, 1839030562),
a4 = a8(a4, a3, G, br, J[bl + 14], bj, 4259657740),
br = a8(br, a4, a3, G, J[bl + 1], L, 2763975236),
G = a8(G, br, a4, a3, J[bl + 4], U, 1272893353),
a3 = a8(a3, G, br, a4, J[bl + 7], z, 4139469664),
a4 = a8(a4, a3, G, br, J[bl + 10], bj, 3200236656),
br = a8(br, a4, a3, G, J[bl + 13], L, 681279174),
G = a8(G, br, a4, a3, J[bl + 0], U, 3936430074),
a3 = a8(a3, G, br, a4, J[bl + 3], z, 3572445317),
a4 = a8(a4, a3, G, br, J[bl + 6], bj, 76029189),
br = a8(br, a4, a3, G, J[bl + 9], L, 3654602809),
G = a8(G, br, a4, a3, J[bl + 12], U, 3873151461),
a3 = a8(a3, G, br, a4, J[bl + 15], z, 530742520),
a4 = a8(a4, a3, G, br, J[bl + 2], bj, 3299628645),
br = bh(br, a4, a3, G, J[bl + 0], bi, 4096336452),
G = bh(G, br, a4, a3, J[bl + 7], a0, 1126891415),
a3 = bh(a3, G, br, a4, J[bl + 14], Y, 2878612391),
a4 = bh(a4, a3, G, br, J[bl + 5], a2, 4237533241),
br = bh(br, a4, a3, G, J[bl + 12], bi, 1700485571),
G = bh(G, br, a4, a3, J[bl + 3], a0, 2399980690),
a3 = bh(a3, G, br, a4, J[bl + 10], Y, 4293915773),
a4 = bh(a4, a3, G, br, J[bl + 1], a2, 2240044497),
br = bh(br, a4, a3, G, J[bl + 8], bi, 1873313359),
G = bh(G, br, a4, a3, J[bl + 15], a0, 4264355552),
a3 = bh(a3, G, br, a4, J[bl + 6], Y, 2734768916),
a4 = bh(a4, a3, G, br, J[bl + 13], a2, 1309151649),
br = bh(br, a4, a3, G, J[bl + 4], bi, 4149444226),
G = bh(G, br, a4, a3, J[bl + 11], a0, 3174756917),
a3 = bh(a3, G, br, a4, J[bl + 2], Y, 718787259),
a4 = bh(a4, a3, G, br, J[bl + 9], a2, 3951481745),
br = bf(br, bg),
a4 = bf(a4, a7),
a3 = bf(a3, bm),
G = bf(G, a6)
}
var V = bd(br) + bd(a4) + bd(a3) + bd(G);
return V.toLowerCase()
}
制作爬虫
既然最难的地方都搞定了，那制作爬虫只是时间上的时间了，鉴于篇幅，爬虫代码就不公布了，感兴趣的朋友可以到这个链接去瞧瞧https://www.shenjian.io/index.php?r=market/product&product_id=500653
测试采集
采集测试效果如下：
采集效果图
重点是支持一键发布哦！content_html字段包含完整的HTML代码，已托管媒体文件，解决防盗链问题。
几笔数据是专业爬虫解决方案提供商，如果您也有采集需求，可以联系我们Q540111029
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